GB2544510A - Conditioning electrical power - Google Patents
Conditioning electrical power Download PDFInfo
- Publication number
- GB2544510A GB2544510A GB1520377.1A GB201520377A GB2544510A GB 2544510 A GB2544510 A GB 2544510A GB 201520377 A GB201520377 A GB 201520377A GB 2544510 A GB2544510 A GB 2544510A
- Authority
- GB
- United Kingdom
- Prior art keywords
- power
- line
- conditioning units
- power conditioning
- input line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/22—Arrangements for adjusting, eliminating or compensating reactive power in networks in cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
A power conditioning system comprising a power input line 2, a power output line 3, a plurality of power conditioning units 4, 5, 6 (eg AC-DC-AC power converters) connected in parallel between the power input line 2 and the power output line 3, wherein each of the plurality of power conditioning units produces a power output, and each of the power outputs is connected to the power output line 3. The system may also include circuit breakers 7, 8, 9 between the power conditioners 4, 5, 6 and the power input line 2. The system may also include an isolator 12, 13, 14 between each of the power conditioning units 4, 5, 6 and the power output line 3. An Ethernet hub 16 may also be connected to a communication line 17 to send a signal to the power conditioning units 4, 5, 6.
Description
Conditioning electrical power
This invention relates to an apparatus and method for conditioning electrical power. Such electrical power could be used for the purpose of providing power, communication, or both power and communication to components of an underwater hydrocarbon extraction facility.
Background
Clean power is essential for the performance and the integrity of a subsea control system, particularly when communication on power (COP) is used to communicate between the components of the subsea control system.
The electrical power for a subsea control system is usually provided from a local uninterruptable power supply (UPS). However, certain factors may cause the local UPS to provide insufficiently clean power.
For example, other loads may draw power from the same input electrical power line, and said loads may generate transients and distortions. Examples of loads that could cause transients and distortions include motors and compressors.
The local UPS may include a bypass, and this may be inadvertently or uncontrollably triggered, resulting in potentially dirty power reaching the subsea control system.
The off-line construction of the UPS may be such that it does not provide clean power.
It is an aim of the present invention to overcome some of the above drawbacks associated with prior art power supplies for subsea control systems. Accordingly, the present invention provides a high-RAM (reliability, availability and maintainability), low-footprint power conditioning system.
As prior art there may be mentioned WO2015/039682, which discloses a voltage regulator for a subsea control system, and US2013/0154393, which discloses a method of protecting against transients in a subsea communication system. As additional prior art there may be mentioned US20120195385, which discloses a communication on power system, US20150008766 and US20150009735, which disclose methods and apparatuses for transferring electrical power for subsea applications. As non-patent literature there may be mentioned “Ultra-long Offset Subsea Developments and the Impact on the Remote Control Infrastructure” by Will Acworth (SPE Russian Oil and Gas Technical Conference and Exhibition, 3-6 October 2006, Moscow, Russia) and “Subsea Hydraulic Power Generation and Distribution for Subsea Control Systems” by Tony Pipe (European Petroleum Conference 25-28 October 1982, London, UK).
Summary of the invention
In accordance with a first aspect of the present invention there is provided a power conditioning system comprising: a power input line; a power output line; a plurality of power conditioning units connected in parallel between the power input line and the power output line, wherein each of the plurality of power conditioning units produces a power output, and each of the power outputs is connected to the power output line.
In accordance with a second aspect of the present invention there is provided a method of supplying power to a subsea control system, said method comprising the steps of: providing a power input line; providing a power output line; connecting a plurality of power conditioning units in parallel between the power input line and the power output line, wherein each of the plurality of power conditioning units produces a power output, and each of the power outputs is connected to the power output line; connecting the power output line to the subsea control system; and supplying power to the power input line. A circuit breaker could be connected between each of the plurality of power conditioning units and the power input line.
An isolator could be connected between each of the plurality of power conditioning units and the power output line.
An Ethernet hub connected to a communication line could be incorporated into the power conditioning system, wherein a communication signal is received by each of the plurality of power conditioning units from the power input line, and a communication output from each of the power conditioning units is connected to the Ethernet hub. The Ethernet hub could be powered by a power supply unit that receives electrical power from the power input line.
Each of the plurality of power conditioning units could include an AC to DC to AC power convertor.
Each of the plurality of power conditioning units could be configured such that the power outputs of the plurality of power conditioning units are synchronised in phase. A static bypass line could be connected to the power input line. A circuit breaker could be disposed between the power input line and static bypass line. A subsea control system including a power conditioning system described above is also provided. Said subsea control system could include a further power conditioning system as described above to provide redundancy.
Detailed description
The invention will now be described with reference to the accompanying drawings, in which:
Fig. 1 schematically shows an apparatus in accordance with a first embodiment of the invention.
Fig. 1 schematically shows a power conditioning system 1 in accordance with a first embodiment the present invention.
The power conditioning system 1 comprises a power input line 2 and a power output line 3. Between the input power line 2 and the power output line a plurality of power conditioning units 4, 5, 6 are connected in parallel via connectors 10, 11. The power outputs of each of the power conditioning units 4, 5, 6 are connected together, such that the power output line 3 is the sum of the power conditioning unit power outputs.
The power conditioning units 4, 5, 6 are synchronised in phase [Silvio: how?] so that each power output is in phase with the power outputs of the other two power conditioning units.
The power conditioning units 4, 5, 6 each comprise an AC->DC->AC double convertor. This means that the power waveform is restored to an AC sine wave after the initial AC to DC conversion. Therefore, any transients or distortions appearing in the electrical power at the input power line 2 will be smoothed out and will not appear in the AC sine wave which is output from each power conditioning unit 4, 5, 6. A plurality of circuit breakers 7, 8, 9 are disposed between the power input line 2 and the power conditioning units 4, 5, 6 and a plurality of isolators 12, 13, 14 are disposed between the power outputs of each of the power conditioning units 4, 5, 6 and the power output line 3. A circuit breaker 15 is also disposed between the isolators 12, 13, 14 and the power output line 3.
The communication outputs of the power conditioning units 4, 5, 6 also feed into an Ethernet hub 16. The Ethernet hub 16 combined the communication signals received from the communication outputs of the power conditioning units 4, 5, 6 and output a combined communication signal to a communication line 17.
The Ethernet hub 16 is powered by a 24V DC power supply unit 19, which receives electrical power from the power input line 2. A circuit breaker 18 is disposed between the power input line 2 and the power supply unit 19.
The power conditioning system 1 also comprises a static bypass line 20. A circuit breaker 21 is disposed between the power input line 2 and the static bypass line 20. A main miniature circuit breaker 22 is disposed between the power input line 2 and all of the components mentioned above.
Advantages provided by the invention
If one or more of the power conditioning units 4, 5, 6 undergoes a failure, the remaining power conditioning units can still support the load on the power output line 3. This results in a high level of redundancy and system availability.
When two of the power conditioning systems 1 are used in a subsea control system (corresponding to a LINE-1 and LINE-2), each power conditioning system may isolated individually, i.e. power may be supplied from LINE-1, LINE-2, or LINE-1 and LINE-2.
The above arrangement also provides full dual redundancy for both power and communications in the subsea control system.
In the above arrangement, maintenance or repair can also be performed on one of the power conditioning systems (e.g. LINE-1) while power and communications are provided by the other power conditioning system (e.g. LINE-2)
As will be seen in Fig. 1, no batteries are needed in the power conditioning system of the present invention, and so the footprint (i.e. the area delimited by the power conditioning system when viewed from above) of the present invention is lower than prior art power conditioning systems. As an example, a typical footprint for the present invention would be 400mm by 800mm.
Alternative arrangements
The invention is not limited to the specific embodiment disclosed above, and other possibilities will be apparent to those skilled in the art.
For example, while the power conditioning system comprises three power conditioning units in the embodiment shown in Fig. 1, this is merely exemplary and more or fewer power conditioning units could be used in practice.
Claims (22)
1. A power conditioning system comprising: a power input line; a power output line; a plurality of power conditioning units connected in parallel between the power input line and the power output line, wherein each of the plurality of power conditioning units produces a power output, and each of the power outputs is connected to the power output line.
2. A power conditioning system according to claim 1, further comprising a circuit breaker connected between each of the plurality of power conditioning units and the power input line.
3. A power conditioning system according to claim 1 or 2, further comprising an isolator connected between each of the plurality of power conditioning units and the power output line.
4. A power conditioning system according to any preceding claim, further comprising an Ethernet hub connected to a communication line, wherein a communication signal is received by each of the plurality of power conditioning units from the power input line, and a communication output from each of the power conditioning units is connected to the Ethernet hub.
5. A power condition system according to claim 4, wherein the Ethernet hub is powered by a power supply unit, and said power supply unit receives electrical power from the power input line.
6. A power conditioning system according to any preceding claim, wherein each of the plurality of power conditioning units includes an AC to DC to AC power convertor.
7. A power conditioning system according to any preceding claim, wherein the each of the plurality of power conditioning units is configured such that the power outputs of the plurality of power conditioning units are synchronised in phase.
8. A power conditioning system according to any preceding claim, further comprising a static bypass line connected to the power input line.
9. A power conditioning system according to claim 8, wherein a circuit breaker is disposed between the power input line and static bypass line.
10. A subsea control system including a power conditioning system according to any preceding claim.
11. A subsea control system according to claim 10, including a further power conditioning system according to any of claims 1-9 to provide redundancy.
12. A method of supplying power to a subsea control system, said method comprising the steps of: providing a power input line; providing a power output line; connecting a plurality of power conditioning units in parallel between the power input line and the power output line, wherein each of the plurality of power conditioning units produces a power output, and each of the power outputs is connected to the power output line; connecting the power output line to the subsea control system; and supplying power to the power input line.
13. A method according to claim 12, further comprising the step of connecting a circuit breaker between each of the plurality of power conditioning units and the power input line.
14. A method according to claim 12 or 13, further comprising the step of connecting an isolator between each of the plurality of power conditioning units and the power output line.
15. A method according to any of claims 12 to 14, further comprising the step of providing an Ethernet hub connected to a communication line, wherein a communication signal is received by each of the plurality of power conditioning units from the power input line, and a communication output from each of the power conditioning units is connected to the Ethernet hub.
16. A method according to claim 15, wherein the Ethernet hub is powered by a power supply unit, and said power supply unit receives electrical power from the power input line.
17. A method according to any of claims 12 to 16, wherein each of the plurality of power conditioning units includes an AC to DC to AC power convertor.
18. A method according to any of claims 12 to 17, wherein the each of the plurality of power conditioning units is configured such that the power outputs of the plurality of power conditioning units are synchronised in phase.
19. A method according to any of claims 12 to 18, further comprising the step of connecting a static bypass line to the power input line.
20. A method according to claim 19, wherein a circuit breaker is disposed between the power input line and static bypass line.
21. An apparatus substantially as hereinbefore described with reference to Fig. 1.
22. A method substantially as hereinbefore described with reference to Fig. 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1520377.1A GB2544510A (en) | 2015-11-19 | 2015-11-19 | Conditioning electrical power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1520377.1A GB2544510A (en) | 2015-11-19 | 2015-11-19 | Conditioning electrical power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201520377D0 GB201520377D0 (en) | 2016-01-06 |
| GB2544510A true GB2544510A (en) | 2017-05-24 |
Family
ID=55133004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1520377.1A Withdrawn GB2544510A (en) | 2015-11-19 | 2015-11-19 | Conditioning electrical power |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2544510A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006024594A1 (en) * | 2006-05-19 | 2007-11-22 | Peter Andersen | Electrical load supplying device for ship, has direct current voltage intermediate circuit connected with alternating current voltage source by tension judge and with alternating current voltage load by another tension judge |
| US20120013193A1 (en) * | 2009-04-17 | 2012-01-19 | Toshiba Mitsubishi-Electric Indus. Sys. Corp. | Uninterruptible power supply system |
| US20120086269A1 (en) * | 2009-09-16 | 2012-04-12 | Toshiba Mitsubishi-Electric Indus. Sys. Corp. | Power conversion system and uninterruptible power supply system |
| US20130099574A1 (en) * | 2011-10-24 | 2013-04-25 | Richard Scott Bourgeois | System and method for multiple power supplies |
| US20130182466A1 (en) * | 2012-01-16 | 2013-07-18 | Delta Electronics (Shanghai) Co., Ltd. | Excitation control circuit and electrically excited wind power system having the same |
| US20140210271A1 (en) * | 2011-06-09 | 2014-07-31 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Uninterruptible power supply system |
| CN204696933U (en) * | 2015-06-23 | 2015-10-07 | 苏州市欧米伽智能控制技术有限公司 | Based on phase-shifting carrier wave technology reactive filter high-power frequency conversion shore electric power device |
-
2015
- 2015-11-19 GB GB1520377.1A patent/GB2544510A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006024594A1 (en) * | 2006-05-19 | 2007-11-22 | Peter Andersen | Electrical load supplying device for ship, has direct current voltage intermediate circuit connected with alternating current voltage source by tension judge and with alternating current voltage load by another tension judge |
| US20120013193A1 (en) * | 2009-04-17 | 2012-01-19 | Toshiba Mitsubishi-Electric Indus. Sys. Corp. | Uninterruptible power supply system |
| US20120086269A1 (en) * | 2009-09-16 | 2012-04-12 | Toshiba Mitsubishi-Electric Indus. Sys. Corp. | Power conversion system and uninterruptible power supply system |
| US20140210271A1 (en) * | 2011-06-09 | 2014-07-31 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Uninterruptible power supply system |
| US20130099574A1 (en) * | 2011-10-24 | 2013-04-25 | Richard Scott Bourgeois | System and method for multiple power supplies |
| US20130182466A1 (en) * | 2012-01-16 | 2013-07-18 | Delta Electronics (Shanghai) Co., Ltd. | Excitation control circuit and electrically excited wind power system having the same |
| CN204696933U (en) * | 2015-06-23 | 2015-10-07 | 苏州市欧米伽智能控制技术有限公司 | Based on phase-shifting carrier wave technology reactive filter high-power frequency conversion shore electric power device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201520377D0 (en) | 2016-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10658838B2 (en) | Method and system for establishing a power feed to systems during operation | |
| US9281666B2 (en) | Subsea electrical distribution system having redundant circuit breaker control and method for providing same | |
| US20180131166A1 (en) | Electrical Bus Interlaced Technique for a Shared Resource Distributed Electrical Power Distribution System | |
| US20090244816A1 (en) | Generator Ready Load Center | |
| US10122291B2 (en) | Redundant control device and method of HVDC system | |
| JP6421824B2 (en) | Feeding path branching device and feeding path branching method | |
| WO2015091154A1 (en) | Converter module and switchgear assembly for ac and dc power distribution | |
| NO325437B1 (en) | Arrangement for external launch of submarine power system | |
| CN102684087A (en) | Bypass operation vehicle capable of enabling users to change distribution transformer without power cutting | |
| EP3132462B1 (en) | Subsea switchgear | |
| WO2007055593A1 (en) | Arrangement for internal black start of subsea power system | |
| KR101742600B1 (en) | Distributing borad with uninterruptible function | |
| CN103063946A (en) | Shore base simulation platform system based on seafloor observatory network | |
| GB2544510A (en) | Conditioning electrical power | |
| KR20190098664A (en) | Power supplying system based on dc for ship capable of bi-polar dc distribution | |
| EP2790286A1 (en) | Switchgear assembly, DC power distribution system, DC power distribution board | |
| CN202503358U (en) | High-voltage auxiliary power system | |
| US10381147B2 (en) | Container arrangement for power transformers | |
| Hazel et al. | Power Distribution for Arctic Subsea Tiebacks | |
| KR20140055482A (en) | Electric power supply system for suppling surplus electric power of the vessel to land | |
| CN203747493U (en) | Multi-substation common security power supply | |
| KR102439181B1 (en) | Power distribution system of ship | |
| Sun et al. | Improving distribution system reliability by means of distributed generation | |
| CN204152824U (en) | Excitation system cooling blower control system | |
| CN216451150U (en) | Integrated transformer device and power transformation system for replacing transformer without power outage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |